Henry conrad sanders



(No Model.)

H. G. SANDERS. PROCESS OF MANUFACTURINGGOLLAPSIBLE TUBES.

Patented July 5, 1892.

3 UNITED STATES PATENT OFFICE.

HENRYOONRAD SANDERS, OF LONDON, ENGLAND.

PROCESS OF MANUFACTURING COLLAPSIBLE TUBES SPECIFICATION forming part ofLetters Patent No. 478,525, dated July 5, 1892.

Application filed May 26, 1891. Serial No. 394,230- (No model.) Patentedin England January 3, 1890, No. 3,243.

.London, England,have invented certain new and useful Improvements inthe Process of Manufacturing Collapsible Tubes, (for which I haveobtained a patent in Great Britain,No. 3,243, bearing date January 3,18510,) of which the following is a specification, reference being hadto the-accompanying drawings.

My invention relates to the manufacture of ornamental tubes fromsoft-metal blanks by causing the metal while cold to flow through an annular space between a punch or plunger and a die having a grooved ortooth-like or corrugated wall, the punch being forced into the blankwhile the latter is held in the aid die. 7

The main object of my said invention is to manufacture ornamental tubes,which can be made into receptacles of the kind known as collapsibletubes or into cylindrical receptacles for various purposes. Tubes forthese purposes have been heretofore made with plain or smooth surfacesby forcing a punch into a metal blank held in a die having a smooth orplain operative edge. By my invention,moreover,I am enabled to produce asoftmetal tube which by reason of the tooth-like projections or groovesor corrugations formed thereon or therein is considerably stronger andmore rigid, weight for weight, than softmetal tubes heretoforemanufactured.

In the accompanying drawings, Figure 1 is a vertical central section ofa die having inclined grooves such as I use in the manufacture of myimproved soft-metal tubes, a portion of the punch or plunger being shownin elevation above the die. Fig. 2 is a sectional view of the die, aportion of the punch or plunger being shown in elevation in its lowestposition and the soft-metal case or tube in section around the punch.Fig. 3 is an elevation of a soft-metal case or tube, as formed in theaforesaid die. Fig.4 is a vertical central section of a die havinglongitudinal grooves and a portion of the punch above the same, and Fig.5 is an elevation of a softmetal case such as would be formed in thisdie.

Like letters indicate corresponding parts throughout the drawings.

In carrying my said invention into practice I form upon the inner faceof the'die A, in which the soft metal is compressed by the punch B, aseries of tooth-like projections C, corresponding in number andarrangement with the grooves itis desired to form upon the finished caseor tube By forming these projections inclined, as shown in Fig. 1, therespective grooves produced thereby in the surface of the soft-metalcase or tube will be formed spirally, the inclination of the spiralscorresponding to that'of the tooth-like projections in the die, while bycausing them to be straight or parallel to the axis of the die thegrooves formed in the tube will be longitudinal or parallel to the axisthereof, as shown in Fig. 5. In these figures O is the tube and O O arecorrugations'or ridgesformed on the surface thereof.

In the manufacture of soft-metal tubes according to my invention I placethe soft-metal blank in the die A, and I then force down upon the samethe plunger B, which is slightly smaller in diameter than the interiorof the die. The metal is thereby squeezed out of the die through theannular space between the die and the plunger, and a tube is thusformed, as shown in Fig. 2, the surface of which is corrugated orgrooved by the aforesaid projections. Sufficient metal is left in thedie after the pressing of the punch into the same to form a closed endto the tube. This end mayserve as the head of a collapsible tube orreceptacle and be bored through and provided with a screw-cap orothertsuitable cover; or the said closed end may bepartiallyremoved,soas toleave aninternal flange, which serves tostrengthen the tube and to which a metal plate or disk may be secured toform the bottom of a boX or other receptacle. It is obvious that if themetal before being pressed fills the die to a higher level than the topof the grooves or corrugations the upper part of the formed tube will beplain, as shown in Figs. 3 and 5.

The die is provided with an axial perforation D, into which a plug E isinserted to partially fill the same before the insertion of thesoft-metal blank from which the tube is to be formed. Into the remainingor upper portion of the said perforation a part of the soft metal issqueezed by the plunger, thereby forming a neck D, Figs. 4 and 5. Whenthe tube is formed, the plug E is forced inward from the bottom of thedie to eject the tube. I prefer to provide an extension B on the punch Bfor hollowing out the neck D.

The length of the projections 0, although usually small, may be variedwith advantage, according to the degree of their inclination to the axisof the die, the length being preferably greatest Where there is mostinclination. If desired, the grooves may extend to the top of the die.

What I claim is- 1. The herein-described method of making an ornamentalcollapsible tube or soft-metal tubular case, consisting in placing asoft-metal blank in acold stateinto a die having grooves or corrugationsaround its operative Wall or edge and then forcing a punch into themetal in the die, so as to squeeze the said metal out through theannular space between said punch and the grooved wall or edge of thedie, substantially as described.

2. The herein-described method of making an ornamental tube, consistingin placing a soft-metal blank in a cold state into a die having groovesor corrugations around its operative edge and then forcing a punch intothe metal in the die, so as to squeeze the said metal out through theannular space between the said punch and the grooved Wall or edge of thedie, leaving sufficient metal in the die to form a closed end to thetube, which, if desired, can be afterward partially removed to form aninternal flange, substantially as described.

In testimonywhereof I have hereunto signed my name in the presence oftwo subscribing witnesses.

HENRY CONRAD SANDERS.

\Vitnesses:

DAVID YOUNG, HARRY GEORGE HOWARD.

